diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 95df62543b..98b47130a1 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -713,26 +713,6 @@ jobs:
           cache-dependency-path: complement/go.sum
           go-version-file: complement/go.mod
 
-      # Run the image sanity check test first as this is the first thing we want to know
-      # about (are we actually testing what we expect?) and we don't want to debug
-      # downstream failures (wild goose chase).
-      - name: Sanity check Complement image
-        # -p=1: We're using `-p 1` to force the test packages to run serially as GHA boxes
-        #     are underpowered and don't like running tons of Synapse instances at once.
-        # -json: Output JSON format so that gotestfmt can parse it.
-        #
-        # tee /tmp/gotest-complement.log: We tee the output to a file so that we can re-process it
-        # later on for better formatting with gotestfmt. But we still want the command
-        # to output to the terminal as it runs so we can see what's happening in
-        # real-time.
-        run: |
-          set -o pipefail
-          COMPLEMENT_DIR=`pwd`/complement synapse/scripts-dev/complement.sh -p 1 -json 2>&1 | tee /tmp/gotest-complement.log
-        shell: bash
-        env:
-          POSTGRES: ${{ (matrix.database == 'Postgres') && 1 || '' }}
-          WORKERS: ${{ (matrix.arrangement == 'workers') && 1 || '' }}
-
       - name: Run Complement Tests
         id: run_complement_tests
         # -p=1: We're using `-p 1` to force the test packages to run serially as GHA boxes